The project placed 3.8 million cubic yards of concrete, enough to build a sidewalk three feet wide and four inches thick from Boston to San Francisco and back three times.
The project installed more than 26,000 linear feet of steel-reinforced concrete slurry walls, which formed the walls of the underground highway as well as the supports for the elevated highway during construction. That's five miles of slurry walls, the largest application of this construction technique in North America, all resting on bedrock up to 120 feet below the streets of the city.
Reinforcing steel used in the project would make a one-inch steel bar long enough to wrap around the earth at the equator.
Elevated Central Artery demolition removed enough structural steel to make five Tobin Bridges